PrimeNG TurboTable技术咨询：dataKey需设为列还是仅为数据对象属性？

Great question! Let's break this down clearly for you:

• Do you need to define dataKey as a table column?
  Nope, you absolutely don't. The dataKey property is purely an internal identifier PrimeNG uses to uniquely track each row in your [value] dataset. It just needs to exist as a property on every object in your data array—think of it like a hidden ID that helps the table handle features like row selection, sorting, row expansion, or state persistence reliably.

  For example, if your data looks like this:

  const users = [
    { userId: 1, name: "Alice", email: "alice@example.com" },
    { userId: 2, name: "Bob", email: "bob@example.com" }
  ];
  

  You'd set dataKey="userId" on the p-table, and you don't need to add a <p-column field="userId"> to your table structure at all.

• If you did define it as a column, does it need to be visible?
  Even if you choose to add it as a column (which isn't necessary), there's no requirement for it to be visible. In fact, most developers would set it to hidden if they ever included it—since dataKey is meant for internal tracking, not user-facing display. You could hide it using the hidden property on the column:

  <p-column field="userId" header="ID" [hidden]="true"></p-column>
  

  But again, this is totally optional. The table works perfectly fine without ever rendering the dataKey as a column.

The key takeaway here is that dataKey is for PrimeNG's internal bookkeeping, not for displaying data to users. As long as it's a unique property on your data objects, you're good to go—no column required.

内容的提问来源于stack exchange，提问作者Dante Orlando